ISIS 'capital' captured in Afghanistan, over 160 fighters killed by US, Afghan troops. ISIS' main stronghold in Afghanistan was captured by U.S and Afghan Special Forces after a prolonged assault that killed nearly 170 terrorist fighters and resulted in no American deaths, military officials said Saturday. >>

ISIS leader in Afghanistan killed in airstrike, US says. The head of ISIS in Afghanistan, Abu Sayed Orakzai, also known as Sad Arhabi, and 10 other ISIS fighters were killed Saturday night in an airstrike in Nangarhar province, according to provincial spokesman Attaullah Khogyani. >>

ISIS leader killed by US drone strike. International relations expert Dr. Rebecca Grant on what to expect in Afghanistan when a new military commander takes over. >>

Leader of ISIS affiliate in Afghanistan killed in US drone strike, officials say. The leader of an ISIS affiliate in Afghanistan who was responsible for a spate of recent bombings that left hundreds of civilians dead was killed in an American drone strike, U.S. officials told Fox News on Sunday. >>

U.S. strike allegedly kills senior ISIS commander in Afghanistan. American military confirms strike in country's east targeted a "senior leader of a designated terrorist organization" >>

US confirms death of ISIS leader in Afghanistan. US forces in Afghanistan confirmed Sunday that the head of ISIS in the country was killed in a strike a little over a week ago. >>

US confirms ISIS leader's death in Afghanistan. US forces in Afghanistan confirmed that the head of ISIS in the country was killed in a strike. >>

US forces say they have killed ISIS leader in Afghanistan. The U.S. military has confirmed the death of the top ISIS leader in Afghanistan, killed by an airstrike in late August. >>

WATCH: ISIS insurgents in Afghanistan prove resilient against U.S. Special Forces. ABC News was given exclusive access to U.S. Special Forces troops fighting on the front line against ISIS in Afghanistan. >>